Taking the iPad2 tablet as an example, the steps to modify the "Device Name" are as follows:

1. Open "Settings" on the desktop, as shown in the figure below.

2. Open "Settings" and find the "General" column and click to enter, as shown in the figure below.

3. Click "About This Mac" in "General", as shown in the figure below.

4. Click the "Name" column in the "About This Mac" page to proceed to the next step, as shown in the figure below.

5. Then enter the modified "name", as shown in the figure below.

6. Return to the "About This Machine" page, and you can see that the "Device Name" has been successfully modified, as shown in the figure below.